Lawrence, 23, moved up from the No. 20 spot last year to dethrone reported mama-to-be Kunis, who dropped to No. 6 this year.
So why the huge jump for the "American Hustle" star?
FHM cited the actress's decision to "fearlessly" chop off her hair into a chic pixie cut, her revelation that Jack Nicholson sent her champagne and flowers after crashing her post Oscar-win interview last year, and her ability to rally an entire nation in "The Hunger Games: Catching Fire" among the reasons that the magazine and the world have fallen " face-over-arse in love" with Lawrence.
Also in the top 10 were British actress and "Coronation Street" Michelle Keegan at No. 2, Rihanna at No. 3, Kaley Cuoco-Sweeting, Beyonce and Scarlett Johansson.